{"instruction": "You are an expert in event argument extraction. Please extract event arguments and their roles from the input that conform to the schema definition, which already includes event trigger words. If an argument does not exist, return NAN or an empty dictionary. Please respond in the format of a JSON string.", "schema": [{"event_type": "adverse event", "arguments": ["Subject", "Effect", "Treatment.Route", "Subject.Age", "Treatment.Freq", "Treatment.Drug", "Subject.Disorder", "Treatment", "Treatment.Duration", "Subject.Gender", "Treatment.Disorder", "Combination.Drug", "Subject.Population", "Treatment.Time_elapsed", "Subject.Race", "Treatment.Dosage"]}], "input": "BACKGROUND: Interferon (IFN)-associated retinopathy is typically characterized by retinal hemorrhages and cotton wool spots at the posterior fundus, but visual function is usually maintained."}
{"adverse event": [{"Subject": "NAN", "Effect": "retinopathy is typically characterized by retinal hemorrhages and cotton wool spots at the posterior fundus", "Treatment.Route": "NAN", "Subject.Age": "NAN", "Treatment.Freq": "NAN", "Treatment.Drug": "Interferon", "Subject.Disorder": "NAN", "Treatment": "Interferon (IFN)", "Treatment.Duration": "NAN", "Subject.Gender": "NAN", "Treatment.Disorder": "NAN", "Combination.Drug": "NAN", "Subject.Population": "NAN", "Treatment.Time_elapsed": "NAN", "Subject.Race": "NAN", "Treatment.Dosage": "NAN"}]}